Locking device for motor valves



July 3, 1923.y 1,460,538

l.. F. EASTON LOOKING DEVICE EOE MOTOR VALVES Filed Aug. 20. 1921 INHZravcnm` M Z M2511 I hereof.

Patented July 3, 1923.

y UNITE s'im'as LOCKING` DEVICE FOR MOTOR VALVES. i

Application led August 20, 1921.

To all rwhom t may concern.

Be it known that I, LUCLAN F. EASTON, a citizen of the United States,and a resident of La Crosse, in the county of La Crosse and ventingvalves for motors from droppingl into the cylinders when they are'notheld in place by spring tension and its object is to provide a simpleand efficient locking device for this purpose.

The invention consists in the several novel features hereinafter setforth and more particularly defined by claims at the conclusion In thedrawings: Fig. 1 is a section illustrating the locking device as appliedto an overhead valve motor. Fig. 2 is a perspec tive of one member ofthe locking device and Fig. 3 is a perspective of the other member ofthe locking device. Fig. 4 is a section of a modified form of theinvention. Figs. 5 and 6 are perspectives of the locking members shownin Fig. 4.

The invention is exemplified in connection with a valve 8 which ismounted in an engine-casing 9 and is adapted to control the delivery offluid to an engine cylinder or the exhaust therefrom. Valve 8 isprovided withv a\stem 10 which is slidably mounted in the casing 9, aswell understood in the art. A. suitable operating member, suchA as arocker-arm 11, is adapted to engage the upper end of the stem to openthe valve and a spring` 12 is applied to the stem to close the valve aswell understood in the art. The upper end ofthe spring engages a head13. The stem 10 passes through the head 13 and is provided with aperipheral groove 14 which is adapted to receive a locking mem- 'ber 15which is provided with an open ended slot 16, so that it may be placedon the stem and interlocked therewith after the head 13 has been placedon the stem. The open ended slot 16 permits said member to be insertedtransversely into and removed transf versely from the groove 14 and fitsinto the groove so that it will be locked against lon- 'tudinal movementon the stem, the ends of ie groove serving as shoulders or abutments forthe faces of said locking member. A ring 17 is provided with a hole 18to receive the valve-stem, is adapted to fit on ters Patent, is

Serial No. 493,975.

the top of locking member 15 and is provided with an annular flange 19which extends around the member 15 and secures it against transversemovement relatively tothe stem. If desired, a cotter pin 20 is insertedthrough valve-stem 10 above the lock ingdevice to hold the ring 17 onmember 15.

In practice, it sometimes occurs that the spring 12 loses its tension orbecomes broken and when that occurs the locking member 15 would nolonger be held against transverse movement by the pressure exerted onthe head 13 by thesprin 12 and, as a result, it would 'become disp acedand permit the valve-stem to drop into the cylinder and cause damagethere. By providing the locking member 17, the slotted member 15 willadapted to be locked to the valve-stem to prevent it from dropping intothe cylinder when the spring for closing the valve is not under tension.v

The invention is not to be understood as restricted to the details setforth, since these may be modified within the scope of the appendedclaims, Without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire tosecure by Let- 1. The combination with a valve p-rovided with a stem, acasing, a spring held by the casing at one end applied to shift thevalve in one direction and a head on the stem serving as an abutment forthe other end of the spring, of a. member on the outer end of said headformed to interlock with thestem so as to be held against longitudinalmovement thereon and having an open-ended slot to permit it to be placedaround the stem, and a locking ring forA closing the slot to secure the'slotted member against transverse displacement from the stem.

f valve in one direction and a head on the stem serving as an abutmentfor the other end of the spring, of a member on the outer end of saidhead formed to interlock with the stem so as to be held againstlongitudinal movement thereon and having an openended slot to permit itto be placed transversely on and around the stem and a ringmember forlocking the slotted member against transverse displacement, one of saidmembers being formed to fit into the other.

3. The combination with a valve having a stem provided with a groove,and a head on the stem, of a locking member for the head to prevent itsremoval from the stem having an open .ended slot to permit it to beplaced transversely around the stem and into said groove, and a ringencircling the stem and formed to secure said member against transversedisplacement from the stem.

4. The combination with a valve having a stem provided With a groove, acasing, a spring held by the casing at one end applied to shift thevalve in one direction and a head on the stem serving as an abutment forthe other end of the spring, of a member on the outer end of. said head,formed to interlock with the stem so as to be held against longitudinalmovement thereon and having an open-ended slot to permit it to be placedtransversely around the stem and ittmg in said groove, and a rin -memberextending `around the stem and ormed to close said slot and secure saidmember against transverse displacement from the stem, one of saidmembers having a recess in which the other is held.

LUCIAN F.- EASTON.

